Sleeve buckling induction support with oblique spiral induction units

Abstract

The invention discloses a sleeve buckling induction support with oblique spiral induction units. The sleeve buckling induction support is composed of end restraining sections, a buckling induction section, an inner sleeve and an outer sleeve, wherein the buckling induction section is clamped between the inner sleeve and the outer sleeve; the inner sleeve and the outer sleeve are each connected with one end restraining section; the buckling induction section is formed by the at least one oblique spiral induction units in the axis direction of the support; each oblique spiral induction unit is a space body formed by oblique and sequential arrangement of m oblique spiral subunits, and the section of the space body is in a spiral line shape; and each oblique spiral subunit is a space body formed by collinear folding of two triangular plates located in the same plane. The sleeve buckling induction support maintains elasticity under small earthquakes, and under intermediate or large earthquakes, the buckling induction section enters the buckling stage and can achieve the effect as a damper due to the excellent retard energy consumption performance.

Description

technical field [0001] The invention belongs to the technical field of building structures, in particular to a casing buckling induction support with oblique spiral induction units, which is suitable for steel structures or concrete structures with buckling restraint supports. Background technique [0002] During the use of steel structures or reinforced concrete structures, ordinary supports will buckle under compression. When the supports buckle under compression, the stiffness and bearing capacity will decrease sharply. Under the action of earthquake or wind, the internal force of the support changes back and forth under the two states of compression and tension. When the support gradually changes from the buckling state to the tension state, the internal force and stiffness of the support are close to zero. Therefore, the hysteretic performance of ordinary supports is poor under repeated loads. In order to solve the problem of buckling under compression and poor hyster...

AI Technical Summary

Problems solved by technology

On June 1, 2016, the applicant proposed a casing-constrained buckling-resistant brace with symmetrical initial defects (application number 201610383428.8) and a casing-constrained buckling-resistant brace with diamond-shaped energy dissipation units (application number 201610383133.0) has a fixed geometry and little design flexibility

Moreover, the thickness and structure of the energy-dissipating unit at the crease in the above support are the same as those at the non-crease, which is not conducive to the generation of plastic hinges at the crease.

In addition, these supports are composed of end restraint segments, buckling segments, and sleeves. The sleeves are on the outside of the buckling segment, and there is no support on the inside of the buckling segment, which is prone to low-order instability toward the inside, thereby weakening the energy dissipation capacity of the support.

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